Potassium
Bromide is commonly used for infrared transmission windows
in gas and liquid
sample cells used with infrared and FTIR spectrophotometers
and for beam splitters for spectrophotometers.
KBr windows are soft and hygroscopic.
ICL is the only company in the United
States that grows KBr.
Optical
Properties--Potassium Bromide (KBr) Optical Crystals
Transmission
Range: 230nm to 25µm
Refractive
Index: 1.524 at
11µm
Reflection
Loss: 8.4% at 10 µm ( 2 surfaces)
Physical
Properties--Potassium Bromide (KBr) Optical Crystals
Melting
Point: 730° C
Young's
Modulus: 26.8 GPa
Apparent Elastic Limit: 160 psi
Structure:
Cubic- (100) cleavage plane
Chemical
Properties--Potassium Bromide (KBr) Optical Crystals
Solubility:
53.4gm/100gm H2O at
0° C
